It started off harmlessly enough with a few funny pictures of cats, but eventually it became the Internet phenomenon par excellence. It's no joke: Perl gives you some great tools for building and customizing memes yourself.

The Jawbone UP electronic bracelet measures the wearer's daily activity and nocturnal sleep patterns. If you are bored by the official smartphone app, you can create your own Perl scripts and access your data via the unofficial web API.

Most command-line tools on Linux come with documentation accessible through the man command. But scrolling up and down the help file trying to figure out how to make a tool do what you want is not always the most efficient way to go. Enter Cheat, a simple Python-based tool that allows you to access cheatsheets for command-line tools.